Jonathan Gibb wrote in to tell us about an (apparently) rather overlooked feature of the Zend Platform 2 - "session clustering".

The solution to sessions spanning multiple nodes adopted by Zend is to simply copy the session info from the last node that had it, which they claim has no overhead - well thats debatable, but it does not sound terrible. However, what everyone seems to have missed is that if a node dies before session info is passed, the session is simply lost. This is not acceptable! How can we argue that PHP is enterprise ready when the "PHP company" offers such a shoddy lack luster solution.

The lack of fault tolerance in Zend's system essentially means that their implementation is more or less memcached, which is a wonderful tool - but everyone using memcached understands its not a persistent, sessions cluster? Session cache more like.

It's a very interesting point - I wonder if anyone from Zend (or anyone that's had experience with the platform already) would refute this...

Any takers?